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Part D1 Roof Drainage Systems (Deemed-to-Satisfy)
D1.1 Deemed-to-Satisfy Provisions
Performance RequirementsDP1.1 to DP1.4 are satisfied by complying with D1.2.
D1.2 General requirements
The design, construction, installation, replacement, repair, alteration and maintenance of a roof drainage system must be in accordance with—
AS/NZS 3500.3; or
for a Class 1 or Class 10 building—
Section 5 of AS/NZS 3500.5; or
acceptable construction practice 3.1.2 and 3.5.2 of NCC Volume Two.
Explanatory information: Cross-volume considerations
NCC Volumes One and Two deal with a number of areas of on-site construction which are relevant to roof drainage systems. These include, but may not be limited to, the following:
NCC Volume One Class 2 to 9 buildings
NCC Volume Two Class 1 and 10 buildings
Service pipework external to the building and penetrations through roof cladding within a bushfire prone area
G5 Construction in Bushfire Prone Areas
3.7.4 Bushfire Areas
Termite management for attachments to a building and penetrations through a slab
B1 Structural Provisions
3.1.3 Termite Risk Management